Technological complex for manufacturing alkyd varnishes

FIELD: chemistry.

SUBSTANCE: preheated oil from a reservoir 9 is loaded into reactor 5 with an agitator 2 and reactor heating thereafter enabled. Dissolved white resin is loaded. After 250C is achieved, nitrogen feed is disabled, while the reactor 5 is connected to a vacuum network. Pentaerithrit and lead siccative are loaded into the reactor 5. Then a reactor degassing system is disabled with enabled inert gas feeding and continued heating of reaction mixture. After re-etherification process is complete, heating of the reactor 5 is disabled, while the reaction mixture is cooled. Phthalic anhydride and maleic anhydride are loaded into the reactor 5. For simplifying water extraction from the reaction zone, xylene from the reservoir 10 is introduced into the reactor 5 by an industrial pipe-line with a pump 46. Water vapour as an azeotrope mixture, together with xylene vapour are directed to a packed column 26 and a refrigerator 27. Resin from the reactor 5 is discharged to a mixer 11. Solvent vapour generated in resin dissolving is delivered to a heat exchanger 33, wherein condensed and flow down back to the mixer 11.

EFFECT: stable characteristics of technological process and improved fire and environmental safety.

20 cl, 2 dwg

 

The invention relates to coatings industry, namely the technological process of production of alkyd varnishes using the automated system of management of the entire process, and can be used to obtain a variety of paints and varnishes based on it and coatings for various purposes, in particular used for painting metal, wooden and other surfaces used in the atmospheric conditions and indoors.

Widely known paints based on alkyd resins, modified vegetable oils. Coatings based on these resins have good physical and mechanical characteristics, but insufficient curing rate.

From monograph Millisec, Biesiadecki "Paints", 1982, M, Chemistry, pp.28-30 well-known device for producing alkyd varnishes and lacquers based on them, including the reactor, mixer, separator vessel, a condenser, a mixer for receiving the finished varnish and other auxiliary equipment (tanks, pumps, dosing vessels, intermediate capacity). To obtain alkyd varnish use the reactor, for example, magneto electric heating and an anchor-blade stirrer and blocked with reactor mixer with a propeller stirrer or frame agitator.

From EN 5538, 1997.12.16 svestka device for producing alkyd varnishes, containing the reactor and the mixer. The installation includes a single reactor for transesterification and polymerization, which is connected with a mixer to obtain the finished product.

The disadvantage of these technical solutions is the inability to obtain alkyd resins or alkyd varnish with stable performance, low sanitary and environmental conditions of its production, the use of manual labor when performing heavy operations, the lack of an automated system of management and control over the whole process.

From SU 1761247, 15.09.1992 known device for the preparation of multicomponent suspensions containing the reactor, at the entrance to which is located a pump, a circulation pump, discharge piping, filter, control system. The plant is equipped with multiple mill, reactor equipped with a jacket for heating. The system contains a control loop temperature control, connected via the first control unit with the actuating mechanism on the line steam flow into the reactor, the control loop dispensing and loading of the reactor, consisting of flow sensors ingredients that are connected via a second control unit with mill and dispensers, as well as the control loop filter cleaning, consisting of mitchiko is, connected to the third control unit.

A disadvantage of the known technical solutions great complexity, power consumption and complexity of the management of technological process of obtaining product on this installation.

The technical objective of the claimed invention is the provision and increase the stability of the characteristics of the technological process (conditions of those or other stages of the process), and get the finished product at different stages (resin and varnish) and, consequently, simplifying the process and improving its fire and environmental safety.

The problem is solved due to the fact that technological complex for the production of alkyd varnishes according to the invention includes a reactor body and the stirrer shaft having a geometric axis and the actuator and is provided with at least one fitting for loading of bulk components, equipped with heat-resistant flap, and at least one inlet to download liquid components, including oil, as well as hydraulically communicated with him by technological pipelines, equipped with shutoff valves and pumping equipment, priceshave store oil and flammable liquids, faucet alkyd resin and solvent, hydraulically communicated to at least one technology pipeline with sborn the com ready varnish, system azeotropic water separation and regeneration related products, as well as pneumatically communicated with the reactor sites dosing and download the original bulk and liquid components and vacuum system of the reactor, the reactor is made with the heater and with not less than two internal heat exchangers, made in the form of coils, independently for each coil connections for input and output of the heat carrier, and the stirrer is made not less than two-bladed main rotor, and the blades are, at least in the lower half of the internal volume of the reactor and have a height of not less than one-fifth the height of the reactor and provided with a limb at least in the lower part thereof.

Thus, the reactor vessel can be made of hermetically joined cylindrical wall, the tops and bottoms, and the heater of the reactor is made sectional, in the form attached to the reactor vessel from the outer side of magneto electric coils-coils, with not less than one, preferably two magneto electric coil located on the side of the housing and at least one magneto electric coil placed in the bottom part, and magneto electric coil covered with a protective jacket preferably of the removable type.

The axis of the agitator may be supported on bearings preferably resistant type is, the latter are, at least in the bottom part of the reactor, and in the bottom of the case mainly coaxially with the shaft of the agitator is bottom outlet pipe with a valve, the lower thrust bearing supported on the bottom of the reactor through axially spaced supporting elements, not overlapping access the internal environment of the reactor to the bottom outlet pipe.

The blades of the mixer can be rigidly attached to the shaft for rotation and limb rejected preferably in the direction of rotation.

System azeotropic water separation and regeneration of intermediate products may include mounted on the upper part of the reactor Packed column and refrigerator, hydraulically communicated with them technological pipelines external heat exchanger and the separator vessel type Florentina consistently reported technological pipelines with the separation vessel to the collector of a mixture of water with a solvent, such as xylene, reactor regeneration of the solvent and the collection of the regenerated solvent separation vessel hydraulically, electrically connected with the Packed column and the reactor through the valves shut-off valves installed preferably on each of the inputs in the Packed column and the reactor, and the reactor, in turn, through the pump on the equipment hydraulically communicated with a collection of the regenerated solvent.

The mixer can be installed on tantoush equipped with a stirrer and a protective jacket and equipped with a preferably external Teploobmennik to condense and return to the mixer evaporating solvents, such as xylene and white spirit, while the heat exchanger is electrically connected hydraulically technological pipelines with a mixer.

Technological complex can be equipped with a unit for obtaining an inert gas, preferably nitrogen, and the last is pneumatically communicated with the reactor and the mixer.

Node dosing and loading of bulk components can contain priceshave store loose components, as well as consistently reported technological pipelines, at least one retrival, one storage hopper mounted on tantoush, pneumodynamic, Ripper and screw bearer for pentaerythritol and consistently communicated to at least one retrival, one storage hopper mounted on tantoush, pneumodynamic, Ripper and screw bearer for phthalic anhydride, and screw applicants for pentaerythritol and phthalic anhydride are placed each in a closed process piping and mounted with a possibility of loose components through heat-resistant valve in the reactor.

Connections input and output tepano is Italia coils of the reactor can be oriented upwards and preferably withdrawn through the lid of the reactor vessel.

The reactor may be equipped with at least three internal heat exchangers-coils.

Nodes dosage and load bulk and liquid components can be executed automated and include sensors and the control and regulation of technological processes of production of alkyd varnishes, and visualization of technological process carried out by providing the ability to display the position of the valves, the other nodes of the used devices and process parameters on remotely installed not less than one monitor and the mnemonic, in addition, the above system is arranged to issue commands to the elements of the regulatory processes.

Technical result achieved the claimed invention is to increase efficiency, fire and environmental safety while reducing the labor intensity and energy intensity of production processes alkyd varnish due to the automatic operations of weighing, dosing and loading of the reactor, mixer and other technological operations, such as azeotropic separation of water at all stages of preparation of the resin and the final product - alkyd varnish, and also due to the developed invention in a closed system load bulk components in roopena environment of the reactor when the serial combination of pneumatic and mechanical conveying of bulk components and turn on the system degassing explosive environment of the reactor for a period of direct the introduction in the reactor bulk and liquid components. Reducing the complexity and the technological ease of management processes is achieved through the installation of bins and mixer on tantoush and excretion of operational data on the parameters of the technological process on the remote display monitor and control processes of the preparation of alkyd varnish.

The technical solution is illustrated in the drawings, which represent a special case of the execution of the technological complex for the production of alkyd varnish, not covering and moreover does not restrict the entire amount of the claims of this decision, where:

figure 1 shows the technological complex of the production of alkyd varnishes;

figure 2 - reactor system magneto electric heating.

Technological complex for the production of alkyd varnishes includes a body 1 and mixer 2 with the geometric axis of the shaft 3 and drive 4 reactor 5 with not less than one equipped with a heat-resistant valve 6 fitting for loading of bulk components and at least one inlet to download liquid components, including oil, and hydraulically communicated with him by technological pipelines 7, equipped with shutoff valves and pumping equipment 8, priceshave store oil and flammable liquids, respectively 9 and 10, will sosite the 11 for alkyd resin and solvent, hydraulically communicated technological line 7 with a collection of ready-made lacquer 12, the system azeotropic water separation and regeneration related products, as well as pneumatically communicated with the reactor 5 nodes dosage and load bulk and liquid components and vacuum system of the reactor.

The reactor 5 is made with a heater and at least two internal heat exchangers, made in the form of coils 13 with Autonomous for each coil pipe 14 for input and output of fluid. Mixer 2 reactor 5 is made not less than two-bladed main rotor, and the blades 15 are, at least in the lower half of the internal volume of the shell 1 of the reactor 5, have a height of not less than one-fifth the height of the reactor and provided with a limb 16, at least in the lower part thereof.

Case 1 reactor 5 is made of a tightly United cylindrical wall 17, the cover 18 and the bottom 19.

The heater of the reactor 5 is made sectional, in the form attached to the shell 1 of the reactor 5 from the outer side of magneto electric coil-windings. Not less than one, preferably two magneto electric coil 20 is located on the wall 17 of the housing 1 of the reactor 5 and at least one magneto electric coil 21 is placed in the bottom part, and magneto electric coil covered with a protective jacket 22 is preferably zhamnov the type.

The axis of the stirrer 2 supported on bearings 23 are preferably resistant type, the latter are, at least in the bottom of the housing 1 of the reactor 5, and in the bottom of the case 1 mainly coaxially with the shaft 3 of the agitator 2 is a bottom outlet pipe 24 with the valve. The lower thrust bearing 23 supported on the bottom 19 of the housing 1 of the reactor 5 through axially spaced supporting elements 25, not overlapping access the internal environment of the reactor 5 to the bottom outlet nozzle 24.

The blades 15 of the agitator 2 is rigidly fixed on the shaft 3 for rotation and limb 16 rejected preferably in the direction of rotation.

System azeotropic water separation and regeneration of intermediate products includes mounted on the upper part of the reactor 5 Packed column 26 and refrigerator 27, hydraulically communicated with them technological pipelines 7 external heat exchanger 28 and the separation vessel 29 type Florentina consistently reported technological pipelines 7 with the separation vessel 29 collection of 30 mixture of water with the solvent, for example xylene, the reactor 31 regeneration of the solvent and the collector 32 of the regenerated solvent. The separation vessel 29 electrically connected hydraulically with the Packed column 26 and the reactor 5 through the valves shut-off valves installed preferably on each of wodo is in Packed column 26 and into the reactor 5. The reactor 5, in turn, through pumping equipment 8 is hydraulically communicated with the collector 32 of the regenerated solvent.

The mixer 11 is installed on tantoush equipped with a stirrer and a protective jacket (not shown) and equipped with a preferably external Teploobmennik 33 for condensing and returning to the mixer 11 evaporating solvents, such as xylene and white spirit, and the heat exchanger 33 is hydraulically looped technological pipelines 7 with mixer 11.

Technological complex is equipped with installation of 34 for receiving an inert gas, preferably nitrogen, and the last is pneumatically communicated with the reactor 5 and the mixer 11.

Node dosing and loading of bulk components contains priceshave store loose components (not shown), consistently reported technological pipelines 7, at least one retrival 35, one storage hopper 36, mounted on tantoush, pneumodynamic 37, Ripper 38 and screw the Complainant 39 for pentaerythritol and consistently communicated to at least one retrival 40, one storage hopper 41, mounted on tantoush, pneumodynamic 42, Ripper 43 and screw the Complainant 44 for phthalic anhydride. Screw constituted 40 and 44 for pentaerythritol and phthalic anhydride, respectively, o f the s each in a closed process piping and mounted with a possibility of loose components through the heat-resistant valve 6 into the reactor 5.

The nozzles 14 of the input and output coolant coils 13 of the reactor 5 is oriented upward and preferably withdrawn through the cover 18 of the housing 1 of the reactor 5.

The reactor 5 is equipped with at least three heat exchangers, coils 13.

Nodes dosage and load bulk and liquid components are automated and include sensors and elements (not shown) of the control and regulation of technological processes of production of alkyd varnishes, and visualization of technological process carried out by providing the ability to display the position of the valves, the other nodes of the used devices and process parameters on remotely installed not less than one monitor and the mnemonic (not shown), in addition, the above system is arranged to issue commands to the elements of the regulatory processes.

On site unloading imported pallets of bulk component (pentaerythritol, phthalic anhydride) and pour the contents into retrival 35 and 40 for pentaerythritol and phthalic anhydride, respectively. From rattributes 35, 40 pneumatic transport delivers bulk component in the storage hopper 36, 41 on tantoush for pentaerythritol and phthalic anhydride, respectively.

Below is an example of gaining the alkyd (pentaftalevyh) varnish on the stated processing facility.

Download liquid raw material into the reactor 5 and the mixer 11 from the existing storage of liquid raw materials - oil and flammable liquids 9 and 10 respectively are carried out by the individual technological pipelines.

Loose components served in bags on pallets in priceshave store loose components from the factory warehouse of raw materials existing truck.

The dosage of white spirit and xylene in the reactor 5 is produced using a liquid counter 45, and the dosage of white spirit and solvent in the mixer 11 - according to the testimony of tensives on which the mixer 11 is installed. When overlapping the power line automatically stops the feed pump 46 for storage of liquid raw materials.

Alkyd varnish is a solution of pentaftalevyh resin in white spirit and solvent. Synthesis of resin is provided in the reactor 5 with a capacity of, for example, 16,0 m3with the system of magneto electric heating, equipped with a Packed column 26, the external heat exchanger 28 and the separation vessel 29, communicated with process piping 7, equipped with shutoff valves. The reactor 5 is also provided with at least one fitting, equipped with heat-resistant valve 6.

Synthesis of resin includes a step of transesterification (alcoholysis) of vegetable oil with pentaerythritol at a temperature of (2505)C in the presence of the cat is Isadora - soda ash and stage polyesterification.

In the reactor 5 download vegetable oil, preheated to a temperature of 70C, or directly from the store 9 liquid raw materials through the mass flowmeter. The pump remote from the shield Instrumentation with remote control. Disabling automatic pump for a given dose.

Close-open shutoff valve on the load line of the oil in the reactor 5 is carried out remotely, automatically and is controlled from the control panel of the shield Instrumentation display operations on the monitor and the mnemonic.

Then download the pentaerythritol and soda ash. Download pentaerythritol in the reactor 5 is an automated dosing system and loading of bulk components, consisting of a hopper 36 on tantoush, pneumomechanical 37, Ripper 38, screw bearer 39 and heat-resistant valve 6 on the nozzle reactor 5. This system is controlled by a personal computer with the remote control panel Instrumentation. Loading starts to signal the operator and ends automatically at a specified dose.

The contents of the reactor 5 is heated to a temperature (2505)C and at this temperature withstand up to obtain solubility of the sample in ethanol in a ratio of 1:5.

Heat the oil and the transesterification is carried out in a current of inert gas, predpochtite the flax nitrogen, supplied through the rotameter on the layer of the reaction mixture.

After aging the reaction mass is cooled to ~180With the flow of water into the inner coil 13, and loads of phthalic anhydride is also automated dosing and loading of bulk components, consisting of a hopper 41 on tantoush, pneumomechanical 42, Ripper 43, screw the giver 44 and temperature flap 6 on the nozzle reactor 5. When loading phthalic anhydride reactor 5 through the heat exchangers connected to the vacuum system of the current production of varnishes for the recovery of phthalic anhydride and acrolein out from the reactor. The existing node capture includes a Packed column, irrigated with a solution of alkali.

The process of polyesterification reaction accompanied by the release of water. For its removal in the reactor 5 download xylene.

Azeotropic mixture of xylene-water, passing through the Packed column 26, is condensed in the heat exchanger 28 and is fed into the separation vessel 29, where xylene through an overflow pipe is recycled back into the reactor 5, and the water flows into the machine.

The process of polyesterification carried out at a temperature (2505)C to the required performance of viscosity and acid number, the temperature in the reactor 5 is maintained automatically.

When reaching the required indexes the contents of the reactor 5 cooling is t to a temperature of 160-180C and when the supply of inert gas into the reactor 5, the obtained resin is poured into the mixer 11 under the layer of pre-loaded solvent (white spirit and solvent).

The mixer 11 with a capacity of preferably 25 m3installed on tantoush frame and equipped with a stirrer, jacket, heat exchanger.

The resin is mixed with a solvent to obtain a homogeneous solution, and the obtained varnish put "like" on the viscosity and the mass fraction of non-volatiles to achieve the required performance. Finished paint pump 47 is fed to the filtering cartridge filter 48, which comes in a collection of 12 prepared varnish with a capacity of preferably 25 m3.

Thus, the synthesis of alkyd (pentaftalevyh) varnish on the stated technological complex is as follows.

Before you start check the reactor 5 purity visual inspection through the hatch. Check the bottom valve of the reactor 5 for proper opening and closing of the valve. Check the agitator trial inclusion. Check the connection of Instrumentation and visual.

Stage of transesterification (alcoholysis) of vegetable oils.

The empty reactor 5 before you download it oil is heated to the temperature of the wall 17 (90-95)C. In the provisioned reactor 5 download oil, preheated to (70-80C, store 9 oil feed pump 49 accordance with the flow chart. After loading oil close the valve on the load line of the oil in the reactor 5, include a mixer 2, a backlight and about the grove reactor 5.

At a temperature of 90With include the supply of inert gas is nitrogen through the rotameter on the layer of the reaction mass, by setting the feed speed of 2-2 .5 nm3/hour.

In the interval of temperatures (110-120C. the heating is stopped and kept the oil at this temperature for 0.5 to 1 hour in order to avoid foaming due to the potential for moisture. After cessation of foaming continue heating.

During the exposure, the flow of cooling water in the refrigerator 27 reduced to a minimum.

If in accordance with the receipt and routing provides download rosin, the temperature in the reactor 5 was raised to 150C and shut off the supply of inert gas into the reactor 5. The reactor 5 is connected to the vacuum system with a vacuum pump 50 vapour recovery harmful substances from the reactor during the loading of bulk components.

Download solution of rosin in an automatic reactor is in the form of its solution in the oil pump on technological pipeline, but the preparation of a solution of rosin oil is located on a separate mixer. Before coming rosin pre-crushed. After downloading rosin resume the flow of nitrogen and heated the reaction mass.

Upon reaching 250C switch off the supply of nitrogen and connect the reactor 5 to the vacuum diagram. Loaded into the reactor 5 the pentaerythritol siccative lead (octoate lead) according to the technological map. After the load is disconnected vacuum system reactor comprises feeding an inert gas through a rotameter with a feed rate of 2-2 .5 nm3per hour and continue heating the reaction mass.

The reaction of alcoholysis of vegetable oils pentaerythritol (transesterification) is conducted at a temperature not higher than 265C. After reaching the temperature of 265C make the excerpt for (1-2) hours and begin sampling intervals (15-30) minutes to check the degree of interesterification.

The interesterification process is considered complete when reaching the solubility of the sample in ethanol in a ratio of not less than 1:5 by volume at a temperature (23-27)C. If after holding the reaction mass for about 2.5-3.0 hours at a temperature of 265C is not reached solubility in the ratio of 1:5, but not less than 1:2, the process of transesterification (alcoholysis) is also considered to be completed.

After completion of the process of interesterification heating of the reactor 5 is switched off and the reaction mass is then cooled through the inner coil 13 to a temperature (180-220C and stop the flow of inert gas.

Stage polyesterification

After cooling the reaction mass to (180-220C. the reactor 5 is connected to the vacuum system of the reactor.

Loaded into the reactor 5 phthalic anhydride, maleic anhydride, if necessary, according to the technological map. Reactionwas heated to 180C and make the exposure at this temperature for 1 hour.

The reaction polyesterification (polycondensation) is emitting reaction of water in quantities of 1 kg/mol per kg/mol of phthalic anhydride, the free fatty acid and rosin. To facilitate the removal of water from the reaction zone is added to the reactor 5 xylene on the counter in the amount indicated in the flow chart, from the storage 10 according to the technological pipeline pump 46. For the process of circulation of xylene (azeotropic distillation of water) use recycled xylene.

Water vapor in the form of an azeotropic mixture with pairs of xylene send in a Packed column 26 and refrigerator 27, is cooled, the excess xylene condenses and flows back to the reactor 5, and the azeotropic mixture and nscontainerframe part of xylene enters the heat exchanger 28 where it condenses and flows into the separation vessel 29. In the lower part of the separation vessel meets the water with partially dissolved by xylene, in the upper part - xylene with partially dissolved by water.

The xylene from the separation vessel 29 through the overflow fitting and hydraulic lock flows back to the reactor 5 or served for irrigation in the upper part of the Packed column 26. The flow xylene azeotrope and emptying of the separator vessel is carried out remotely, automatically from a control panel in panel Instrumentation with our the receiving position of valves on the diagram.

At the beginning of the polycondensation process for 4-6 hours distant xylene served on the Packed column 26 to trap vapors of phthalic anhydride and return it to the reaction mass.

After this time switch the supply of distant xylene directly into the reactor 5, and the cooling water supply to the refrigerator 27 change to a minimum, always leaving a small expense.

The supply and regulation of the circulating water is carried out remotely and automatically from a control panel in panel Instrumentation display position of valves on the diagram.

Regulation of water supply to the heat exchangers is carried out in automatic mode according to the value of the set temperature.

Since the circulation of xylene begins the conclusion of the reaction of moisture from the reaction zone in the separation vessel 29.

After each discharge of the reaction water from the circulation system of xylene derive the appropriate number of xylene and the temperature of the reaction mass is gradually increased.

Since the circulation of xylene, using the above-mentioned processing method, raise the temperature of the reaction mass up to 220C for not more than (3.5 to 5) C. Technological process is carried out in the temperature range (220-240C to reach an acid number of not more than 10 at a constant circulation of xylene.

After reaching acids is th number 10 if necessary, the temperature of the reaction mass gradually raise and lead the process of increasing the viscosity to a value of stopping values. With a chain of increasing the viscosity of possible technological process with a weak circulation xylene.

To achieve the required performance for viscosity and acid number off heating and cooling the resin to (150-180C, using the flow of the circulating water in the coil reactor, as described above.

After cooling the reaction mass to (150-180)With the water supply to the coil is closed, the water outlet of the coil is left open.

After cooling analyze the resin viscosity and acid number.

The viscosity of the resin before discharge into the mixer must not be lower than specified in the routing and an acid number of not more than 10 mg KOH/g (or in accordance TU).

The resin from the reactor is drained by gravity into the mixer 11. During the discharge of the resin in the mixer 11 rinse the reactor 5. This is poured into the mixer 11 approximately one third of the resin. Stop the mixer 2 and the load on the remaining resin (500-1000) litres of white spirit. Continue draining the resin in the mixer without mixing. Hot pair of white spirit rise in the vertical portion of the reactor are condensed and flow down the walls of the apparatus, washing it. Before downloading white spirit for leaching open maximum flow of cooling water in the refrigerator 27, to exclude the presence of solvent vapor in the separation vessel 29. After draining reactio the Noah mass in the mixer closed bottom valves of the reactor and load it (500-1000) l white spirit. Heat the solvent under stirring to a temperature of 80-100C., kept at this temperature (0,5-1) h and the solvent is drained to the main mass in the mixer 11. The mixer is installed on tantoush displaying the weight on the scoreboard at the place and display readings on the monitor and display on the remote control panel Instrumentation.

The number loaded into the reactor of the solvent into account by dissolving the resin and setting the "type".

Dissolution of the resin and the production of varnish on the "type"

Dissolution of the resin and the production of varnish on the type carried out in the mixer 11, provided with a jacket for cooling circulating water, a stirrer and equipped with a heat exchanger 33. On the basis of the viscosity of the obtained resin, in addition to white spirit can be used solvent and xylene. The use of recovered xylene for the production of "type" is not allowed.

For the production of varnish on the "type" is loaded into the mixer 11 through the meter white spirit in accordance with the routing. In the jacket of the mixer and heat exchanger 33 serves water, include the stirrer.

The resin from the reactor 5 at a temperature (150 to 180)C is poured into the mixer 11. Resin pereshivayut with the solvent until a homogeneous solution, which can be verified by loading the sample on the glass, then make the production of varnish on the type on viscosity and the mass fraction of non-volatiles in accordance the specifications by adding solvents.

Solvent vapours formed during the dissolution of the resin flow to the heat exchanger 33, condense and drain back into the mixer 11.

In the formulation of the lacquer on the type solvents are used: white spirit, solvent, xylene.

After each additive solvent solution of the resin is thoroughly mixed for at least (1-2) hours and the paint checked for compliance with SPECIFICATIONS.

The varnish must meet the following criteria:

the viscosity of the varnish at (200,5)C (50% solution in white spirit) viscometer VZ-246 with the nozzle diameter of 4 mm must be at least 70;

- an acid number of not more than 10 mgKOH/g to top grade, not more than 15 mgKOH/g to 1 grade:

- mass fraction of solids of not less than (602)%;

or

the viscosity of the varnish at (200,5)With the viscometer VZ-246 with the nozzle diameter of 4 mm must be (60-80);

- an acid number of not more than 12 mgKOH/g for the top grade, not more than 15 mgKOH/g to 1st grade, not more than 20 mgKOH/g to 2 varieties;

- mass fraction of solids (52-55)% for the highest grade, (51-55)% for 1 and 2 grades.

The flow of solvent in the mixer 11, i.e. the control of shutoff valves and pumps, carried out remotely automatically according to the set dose from the remote control panel Instrumentation display position of valves and pump status on the monitor and the mnemonic in the shield Instrumentation.

To achieve these show the oil varnish from the mixer 11 is fed to the filter. The temperature of the varnish before the filter should be (50-60C, but not below 40C.

When filtering the flow regulation of the circulation automatically at the specified pressure on the pump. Control of shutoff valves and pumps automatic remote control panel in panel Instrumentation with the display status of valves and pumps on the monitor and on the diagram.

All this allows you to secure the entire process, to make it environmentally friendly, to ensure the stability conditions for all stages and process in General, as well as the stability of properties of the resulting varnish.

1. Technological complex for the production of alkyd varnishes, characterized in that it includes a reactor body and the stirrer shaft having a geometric axis and the actuator, and is provided with at least one fitting for loading of bulk components, equipped with heat-resistant flap, and at least one inlet to download liquid components, including oil, as well as hydraulically communicated with him by technological pipelines, equipped with shutoff valves and pumping equipment, priceshave store oil and flammable liquids, faucet alkyd resin and solvent, hydraulically communicated to at least one technological pipeline with the collection is m ready varnish, system azeotropic water separation and regeneration related products, as well as pneumatically communicated with the reactor sites dosing and download the original bulk and liquid components and vacuum system of the reactor, the reactor is made with the heater and with not less than two internal heat exchangers, made in the form of coils, independently for each coil connections for input and output of the heat carrier, and the stirrer is made not less than two-bladed main rotor, and the blades are, at least in the lower half of the internal volume of the reactor and have a height of not less than one-fifth the height of the reactor and provided with a limb at least in the lower part thereof.

2. Technological complex according to claim 1, characterized in that the reactor vessel is made of tightly United cylindrical wall, the tops and bottoms, and the heater of the reactor is made sectional in the form attached to the reactor vessel from the outer side of magneto electric coils - coils, with not less than one, preferably two, magneto electric coil located on the side of the housing and at least one magneto electric coil placed in the bottom part, and magneto electric coil covered with a protective jacket, preferably of the removable type.

3. Technological complex according to claim 2, from which causesa fact, the axis of the agitator supported in bearings, preferably, the thrust type, the latter are, at least in the bottom part of the reactor, and in the bottom of the case, mainly, coaxially with the shaft of the agitator is bottom outlet pipe with a valve, the lower thrust bearing supported on the bottom of the reactor through axially spaced supporting elements, not overlapping access the internal environment of the reactor to the bottom outlet pipe.

4. Technological complex according to claim 1, characterized in that the blades of the mixer is rigidly mounted on the shaft for rotation and limb rejected, preferably in the direction of rotation.

5. Technological complex according to claim 1, characterized in that the system azeotropic water separation and regeneration of intermediate products includes mounted on the upper part of the reactor Packed column and refrigerator, hydraulically communicated with them technological pipelines external heat exchanger and the separator vessel type Florentina consistently reported technological pipelines with the separation vessel to the collector of a mixture of water with a solvent, such as xylene, reactor regeneration of the solvent and the collection of the regenerated solvent separation vessel hydraulically, electrically connected with the Packed column and react the rum through the valves shut-off valves, mounted, preferably, on each of the inputs in the Packed column and the reactor, and the reactor, in turn, through the pumping equipment is hydraulically communicated with a collection of the regenerated solvent.

6. Technological complex according to claim 1, characterized in that the mixer is installed on tantoush equipped with a stirrer and a protective jacket and equipped, preferably, the external Teploobmennik to condense and return to the mixer evaporating solvents, such as xylene and white spirit, while the heat exchanger is electrically connected hydraulically technological pipelines with a mixer.

7. Technological complex according to claim 1, characterized in that it is provided with a unit for obtaining an inert gas, preferably nitrogen, and the last is pneumatically communicated with the reactor and the mixer.

8. Technological complex according to claim 1, characterized in that the node dosing and loading of bulk components contains priceshave store loose components, as well as consistently reported technological pipelines, at least one retrival, one storage hopper mounted on tantoush, pneumodynamic, Ripper and screw bearer for pentaerythritol and consistently communicated to at least one retrival, one storage hopper mounted on tantoush, pneum the lift, Ripper and screw bearer for phthalic anhydride, and screw applicants for pentaerythritol and phthalic anhydride are placed each in a closed process piping and mounted with a possibility of loose components through heat-resistant valve in the reactor.

9. Technological complex according to claim 1, characterized in that the nozzles of the input and output coolant coils of the reactor is oriented upwards and preferably withdrawn through the lid of the reactor vessel.

10. Technological complex according to claim 1, characterized in that the reactor is equipped with at least three internal heat exchangers - coils.

11. Technological complex according to claim 1, characterized in that the nodes dosage and load bulk and liquid components are automated and include sensors and the control and regulation of technological processes of production of alkyd varnishes, and visualization of technological process carried out by providing the ability to display the position of the valves, the other nodes of the used devices and process parameters on remotely installed not less than one monitor and the mnemonic, in addition, the above system is arranged to issue commands to the elements of the regulatory processes.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: group of inventions refers to making paint compositions, such as enamels, namely, to making various-palette alkyd-urethane enamels to be used for protective decorative coating of various surfaces. Paint alkyd-urethane enamel compositions contain a combination of, at least, one alkyd varnish, and, at least, one alkyd-urethane varnish, dye-forming pigment additive component necessary to form enamel colour, at least, one organic solvent, dispersant, siccative and other auxiliary base additives, including, at least, one rheological additive, antiskinning additive, antidimpling additive. Herewith alkyd-urethane varnish content in the composition is at least 10% of total weight of the specified varnishes and/or at least 8% of paint composition weight.

EFFECT: high stress-strain properties and processing behaviour of produced enamels.

13 cl, 2 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention concerns paint-and-varnish industry, particularly alkyd varnish production using automated control system of technological process, as well as feeding of bulk components to reactor with explosive medium. Method of alkyd varnish production involves alcoholytic re-etherification of vegetable oil by pentaerythritol with heating in inert gas flow in the presence of catalyst, followed by polyetherification of re-etherification products by phthalic anhydride with heating, water distillation with azeotropic solvent, reaction product - alkyd resin - cooling to 160-180°C, varnish preparation by mixing obtained resin with organic solvent. Re-etherification and polyetherification process is performed in reactor featuring electric induction heating system and connected to technological pipelines with stop valves. Reactor has at least one pipe socket with heat-resistant gate installed in it, and at least two water heat exchangers in the form of worm pipes, mixer, nozzle column, vertical cooler, condenser and separation vessel. Alkyd resin dissolution is performed in mixer with stop valves, mixer, jacket and reverse heat exchanger for condensation and recycling of evaporating solvents in the mixer; vegetable oil dosing and loading to reactor is performed by automated control system, where stop valves of oil feed line are opened and closed by remote controls automatically or steered from control console; dosing and loading of bulk component, such as pentaerythritol and phthalic anhydride is performed and controlled over automated control system for bulk component dosage and loading, including depacker, tanker on tension weighing device, pneumatic lift, at least one ripper, snail feeder and mentioned heat-resistant gate in pipe socket of reactor; dosing and loading of azeotropic solvent and water to worm pipes of reactor, as well as recycled water feed and control and solvent feed to mixer are performed with remote automatic control of stop valves. In addition invention claims method of bulk component feed to reactor used in production of alkyd varnish.

EFFECT: reduced labour cost, improved fire protection and environmental safety.

22 cl, 1 tbl, 2 dwg, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to paint-and-varnish industry, in particular to method for production of alkyd-urethane enamels of various colours, and may be used to produce protective-decorating enamel coatings applied onto various substrates. Method for production of alkyd-urethane enamel is described. This method implies preparation of individual precursor components, their dosing, preparation of intermediate enamel product by combining alkyd pentaphthalic lacquer with dispersing medium, organic solvent and rheological agent, the mixture being stirred at 300-500 rpm, followed by introduction of free-flowing pigments into the mixture, together with filler, when required. Pigments and filler are pre-dispersed under stirring at a speed up to 1000 rpm until homogenous suspension is obtained. Then intermediate product is further dispersed until required degree of grinding is obtained, alkyd-urethane lacquer is added under stirring and, when required, anti-crater additive and paint dryer are added. Then, pigment tinting paste is added, the mixture is stirred to obtain homogenous suspension, and antiskinning agent is added.

EFFECT: production of alkyd-urethane enamels of various colours, with high physical and chemical properties.

10 cl, 5 tbl

Pigmental paste // 2328512

FIELD: chemistry.

SUBSTANCE: invention relates to the pigmental paste for paint toning. The pigmental paste for toning the covering composition is described, where the pigmental paste includes: at least one ramified alkide with the viscosity less than 5 Pa·s at 23°C and shift rate 100 c-1 and the number-average molecular weight Mn>1500, which contains the groups for the oxidising drying produced from the fatty acids; one or several solvents without aromatic substances - 28 mass percent; and one or several pigments. At that, the rate of alkide ramification is at least 0/35 and preferably less than 0.42, alkide fatness is at least 76 and preferably less than 84, the alkide acidity index is within 6 to 9 mg KOH/g; the solvent without the aromatic substances contains the aliphatic hydrocarbon solvents, ketones and/or complex ethers with molecular weight Mn>1500. The method for paint toning is described where the principal paint is selected from the set of principal paints and then mixed with the said pigmental paint, at that, the principal paint corresponds to the composition based on solvent and containing alkide.

EFFECT: invented pigmental paint is useful in toning paint with high concentration of solid substances.

11 cl, 8 dwg

Priming composition // 2322467

FIELD: protecting materials.

SUBSTANCE: invention relates to priming compositions used for anticorrosive covers applied on surface of mainly ferrous metals in machine engineering, and woody and other materials. The priming composition comprises lacquer GF-01, red pigment, siccative, solvent, chalk of sort M-5 and lecithin as a disperser, siccative NF-1 as a siccative, and slime after dry scrubbing in electric steel melting production of the following chemical composition, wt.-%: SiO2, 7.76; phosphorus (P), 0.041; chrome (Cr) total, 1.0; Al2O3, 0.93; TiO2, 0.099; MnO, 2.29; CaO, 21.3; MgO, 24.5; FeO, 3.91; Fe2O3, 32.02; CaF2, 5.26; CaO (incompletely burned material), 0.89 in the following granulometric composition of slime, %: below 20 mcm, 15; from 20 to 25 mcm, 60, and from 25 to 100 mcm, 25. Invention provides decreasing cost and enhancing exploitation parameters of the priming in coating the broad spectrum of surfaces in machine engineering and building.

EFFECT: improved and valuable properties of priming composition.

5 tbl

FIELD: paint and varnish materials.

SUBSTANCE: invention relates to coloring pastes designated for using in ready basic pant and varnish materials that are soluble in organic solvents. Universal pigment coloring paste comprises pigment, film-forming agent, disperser, thickening agent and organic solvent. Alkyd glyphtal resin based on flax oil, glycerol and phthalic anhydride is used as a filling agent taken in the ratio, wt.-%: 45-47; 17-19 and 34-38, respectively, with viscosity index 60 measured at temperature 20.0 ± 0.5°C by viscosimeter device VZ-246 as 50% resin solution in xylene and having acid number 17-19 mg of KOH/g taken in the amount 30-40 wt.-%. Thickening agent Clayton AF is used a thickening agent taken in the amount 0.3-0.5 wt.-%. Xylene is used as an organic solvent taken in the amount 34-45 wt.-%. Disperser is used in the amount 0.9-2 wt.-%, and pigment, the balance. Invention provides expanding assortment of coloring pigment pastas, their using in different basis of dyes in organic solvents, providing stability of dyes and without unfavorable effect of properties of paint and varnish covers.

EFFECT: improved and valuable properties of paste.

4 tbl

FIELD: household chemical goods.

SUBSTANCE: invention provides composition for applying self-oxidizing architectural coating, which is suitable for handling by inexperienced users having no personal respiratory protection devices at ambient temperatures and natural day light. Composition contains self-oxidizing polymeric binder and promoter system to promote self-oxidation of the binder, which promoter contains from 0 to 0.01 wt % cobalt ions and metal ions other than cobalt ions promoting surface self-oxidation in amount 0.001 to 0.04 wt % and those promoting bulk self-oxidation in amount 0.5 to 2 wt %, and also at least one photoinitiator in amount 0.3 to 2 wt %, all based on the weight of binder. This composition is applied onto surface to obtain dried architectural coating irradiated by low-energy radiation in the form of light with wavelength between 350 and 650 nm. Composition removes need of utilizing larger than trace amounts of cobalt ions, which are considered to be carcinogenic, and ensures achievement of suitably high self-oxidation rates. No cobalt utilization is preffered. Utilization of low concentrations of other metal ions leads to reduction in composition color variation, often al levels lower than those achieved when utilizing common cobalt promoters.

EFFECT: avoided need of high-energy irradiation and accurately controlled conditions, and improved luster of coating.

7 cl, 4 dwg, 7 tbl, 9 ex

FIELD: ferrous metallurgy; oil refining industry; building industry; chemical industry; compositions for production of the anticorrosive zinc-containing base coatings.

SUBSTANCE: the invention is pertaining to the compositions for production of the anticorrosive zinc-containing base coatings intended for a sacrificial protection from corrosion of the products, buildings and constructions made out of the ferrous metals exploited in the atmospheric conditions, in the conditions of water-saline mist, in the medium of the oil products vapors and aerosols. The composition for production of the antirust coating includes the fine-dispersive zinc powder, the three-metal desiccant, the toluene, the modified alkyd film-forming substance, in the capacity of which they use the short-alkyd varnish with addition of the tung oil, modified with the phenol-formaldehyde resin in amount of no more than 5.0 % of the mass of the alkyd film-former, with the acid number of no more than 15.0 mgKOH/g of the film-former and the dynamic viscosity after Brunkfild - 2.0-4.5 Pa·s, and the antisediment additive, in the capacity of which use the admixture of zinc oxide, lecithin and the organophilic bentonite of SD-1 brand. The composition has the high sediment stability at storing and at coating, dries faster and ensures production of the antirust coatings with the heightened resistivity to the water and petroleum action.

EFFECT: the invention ensures production of the composition having the high sediment stability at storing and coating, the fast drying and used for application of the antirust coatings with the heightened resistivity to the water and petroleum action.

2 tab

FIELD: chemical technology, in particular paint composition based on alkyd resin useful in production of protective-decorative covers for wood and metal.

SUBSTANCE: claimed protective-decorative paint includes film-forming agent based on alkyd resin, pigment, drying accelerator, and solvent. As pigment paint contains white pigment such as titania and colored pigment such as wolchonskoit mineral powder.

EFFECT: environmentally friendly paint with good appearance, high adhesion to surfaces and protective effects.

2 tbl, 2 ex

Paint // 2296146

FIELD: chemical technology, in particular paint composition based on alkyd resin useful in production of protective-decorative covers for wood and metal.

SUBSTANCE: claimed protective-decorative paint includes colored pigment such as wolchonskoit mineral homogeneously dispersed in liquid binding agent medium, selected from group containing acryl-rubber, epoxy, alkyd resins or varnish in amount of wolchonskoit 10-90 mass %, liquid binding agent 90-10 mass %, wherein liquid binding agent may contain special additives.

EFFECT: paint with increased performance characteristics.

5 tbl, 4 ex

FIELD: technological processes.

SUBSTANCE: invention concerns chemical industry and can be applied in cases where thermal processing of granular materials is required in manufacturing of catalysts, carriers, adsorbents, drying agents, in a drying and cooling process in chemical, food and woodwork industries. Aggregate includes vessel for source material, heaters, vertical shaft with rotation drive and poppet mounted on it. Source material flow controller is made in the form of bushing interacting with shut-off cone and mounted in the bottom part of source material vessel. Material flow controller has a drive for axial shift of the cone. At that bushing remains at its place, and flow controller drive has reverse temperature correlation with automatic programmed control system. Method involves material loading, distribution and transportation due to centrifugal forces at the heated rotating poppet surface. Poppet temperature is maintained by calibration clearance area adjustment at full heater output.

EFFECT: enhanced aggregate efficiency.

3 cl, 2 dwg

FIELD: technological processes.

SUBSTANCE: invention pertains to reactors and heat-mass transfer apparatus and can be used in the silicon organic industry for obtaining alkoxy silanes. The reactor for direct synthesis of alkoxy silanes has a column type case, a device for loading and offloading reaction products and a multiple impeller. The reactor has baffle plates between agitator paddles and a sludge remover on the circulation pipe. The baffle plates are installed at an angle of 15-90° to the horizontal. There is increased productivity, efficiency of the heat-mass transfer and reaction processes with high conversion of silicon, as well as completeness of continuous production.

EFFECT: increased productivity, efficiency of heat-mass transfer and reaction processes with high conversion of silicon; provision for continuous production.

1 dwg

Reactor // 2330715

FIELD: engines and pumps.

SUBSTANCE: invention can be used for intensification of heterogeneous processes at excess pressures accompanied by a significant gas and heat evolution. The reactor shell consists of a cylindrical shell ring, a lower and upper bottoms, and is fitted in a circular support. The lower bottom accommodates a neck, a gas separator connected via a branch pipe to the neck, a sampler and a catalyst inlet pipe, the neck outer surface being attached by stiffening ribs to the circular support. A coiled jacket is arranged below the circular support on the shell ring outer surface. A sprinkler, foam killer and a gate agitator are fitted on a cantilever shaft. The cylindrical shell ring periphery, inside the reactor shell, accommodates six deflector partitions with the lower and upper coiled heat exchangers attached thereto and arranged, respectively, below and above a static agitator attached to the shell ring inner surface.

EFFECT: higher efficiency and higher quality of finished products.

8 cl, 1 dwg

FIELD: heat treatment of fluid products.

SUBSTANCE: the offered group of inventions is pertaining to the field of heat treatment of fluid products. The treatment is carried out by a means of heat produced at fluid friction which is created by a mechanical forced circulation of the fluid product in the heat treatment device which, at least, has one mechanical heater conducting a mechanical work on the treated product. At that the device consumed mechanical power within the range of the operational temperatures meets the following requirement: where W - is a mechanical power consumed by the heat treatment device ( expressed in W), W* - is a total power of heat losses (in W); T - is a rate of heating required in compliance with the production process (°\s); C - is the product heat capacity (Joule/ (kg·degree)), m - a mass of the product subjected to the heat treatment (kg); an index i is used to number the endothermic processes;qi - a-specific heat of formation of the resultant component in the i-th process (Joule/kg), MI - is a required speed of its formation at the temperature of realization of endothermic process (kg/s). The given engineering solution ensures composition of the product, its physical and chemical properties, a high speed of the process without deterioration of the product quality.

EFFECT: the invention ensures composition of the product, its physical and chemical properties, a high speed of the process without deterioration of the product quality.

15 cl, 2 dwg, 3 ex

The invention relates to the chemical industry and for the installation termoparnaya processing of bulk materials containing the tank for the source material, the heaters and the rotational drive, it includes a vertical shaft with a fixed plate mounted in the housing, the flow regulator material, mounted in the lower part of the vessel for the source material, the actuator rotates the shaft, there is a cooling-quenching products termoparnaya processing, and the working surface of the plate is made conical or curved, providing expansion up

The invention relates to methods and devices that allow physical and chemical processes in liquid environments

The invention relates to equipment for uranium production and can be used in chemical, metallurgical and other industries

The invention relates to a device for contacting the solid material in the form of loose particles of liquid or solid material from liquids and gases in the reactor by bringing the reactants into contact with each other, comprising a housing and a fixed sieve element, which is communication, with the sieve element is designed as a rotating drum 5

FIELD: heat treatment of fluid products.

SUBSTANCE: the offered group of inventions is pertaining to the field of heat treatment of fluid products. The treatment is carried out by a means of heat produced at fluid friction which is created by a mechanical forced circulation of the fluid product in the heat treatment device which, at least, has one mechanical heater conducting a mechanical work on the treated product. At that the device consumed mechanical power within the range of the operational temperatures meets the following requirement: where W - is a mechanical power consumed by the heat treatment device ( expressed in W), W* - is a total power of heat losses (in W); T - is a rate of heating required in compliance with the production process (°\s); C - is the product heat capacity (Joule/ (kg·degree)), m - a mass of the product subjected to the heat treatment (kg); an index i is used to number the endothermic processes;qi - a-specific heat of formation of the resultant component in the i-th process (Joule/kg), MI - is a required speed of its formation at the temperature of realization of endothermic process (kg/s). The given engineering solution ensures composition of the product, its physical and chemical properties, a high speed of the process without deterioration of the product quality.

EFFECT: the invention ensures composition of the product, its physical and chemical properties, a high speed of the process without deterioration of the product quality.

15 cl, 2 dwg, 3 ex

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